G'day, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.88%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 506 days | 100% |
| Anne | 7/10 | 841 days | 70% |
| ros fraser | 4/10 | 2851 days | 2% |
| wynden | 1/10 | 2879 days | 1% |
| Rado Hank | 10/10 | 2966 days | 3% |
| Lizzie Edmonds | 8/10 | 2967 days | 3% |
| Anis Quentin | 7/10 | 2974 days | 3% |
| Jeny Smolders | 7/10 | 2978 days | 3% |
| Oscar Petersen | 8/10 | 2985 days | 3% |
| Ani | 9/10 | 3094 days | 3% |
| Martin Murlik | 8/10 | 3206 days | 3% |
| Laura | 9/10 | 3217 days | 3% |
| Melanie Farrell | 7/10 | 3225 days | 3% |
| Andy | 10/10 | 3232 days | 3% |
| Julia Achatz | 5/10 | 3246 days | 2% |
| Auba Mateos | 7/10 | 3252 days | 3% |
| Charlotte | 7/10 | 3252 days | 3% |
| Isabel Zedelius | 8/10 | 3255 days | 3% |
| Dries | 8/10 | 3295 days | 3% |
| Clarissa Glaser | 8/10 | 3296 days | 3% |
| Alna | 10/10 | 3301 days | 3% |
| Holger Worner | 9/10 | 3301 days | 3% |
| Karlee Hormell | 9/10 | 3310 days | 3% |
| Alonso | 9/10 | 3314 days | 3% |
| Rose Guillaume | 8/10 | 3317 days | 3% |
| Caroline Coudray | 8/10 | 3321 days | 3% |
| Barbara | 8/10 | 3321 days | 3% |
| Leonie Brabers | 7/10 | 3329 days | 2% |
| Bina Johansson | 10/10 | 3329 days | 3% |
| Sam Staines | 9/10 | 3333 days | 3% |
| Erik | 6/10 | 3336 days | 2% |
| Nicole Signer | 8/10 | 3343 days | 2% |
| Sam Taylor | 7/10 | 3347 days | 2% |
| Vanuxem | 8/10 | 3551 days | 2% |
| Clara Bertomeu | 10/10 | 3551 days | 2% |
| Lukas Boller | 9/10 | 3553 days | 2% |
| Mette Elholm | 7/10 | 3567 days | 2% |
| Mathilde Arp | 8/10 | 3567 days | 2% |
| Chloe and Guillame | 9/10 | 3571 days | 2% |
| Andre | 9/10 | 3573 days | 2% |
| Doerte | 10/10 | 3573 days | 2% |
| Saskia Peek | 9/10 | 3574 days | 2% |
| Erika Tarant | 8/10 | 3574 days | 2% |
| Jennifer Nguyen | 7/10 | 3575 days | 2% |
| Julie Duvert | 7/10 | 3575 days | 2% |
| Dan Ramsl | 4/10 | 3575 days | 1% |
| Lucy Mulvin | 7/10 | 3576 days | 2% |
| Fine Kochling | 9/10 | 3578 days | 2% |
| Eberhard | 9/10 | 3578 days | 2% |
| Hannes | 8/10 | 3579 days | 2% |
| Calum Penn | 9/10 | 3581 days | 2% |
| Arthur Portolleau | 6/10 | 3582 days | 2% |
| Elisabet | 10/10 | 3583 days | 2% |
| Tommy Mannien | 8/10 | 3584 days | 2% |
| Solange Bourbeois | 8/10 | 3587 days | 2% |
| Talissa Missiato | 10/10 | 3587 days | 2% |
| Severin Knegsch | 9/10 | 3588 days | 2% |
| Pierre Jouffineau | 10/10 | 3589 days | 2% |
| Lewis Whittle | 8/10 | 3591 days | 2% |
| Ben and Pauline | 8/10 | 3593 days | 2% |
| Ann-Kathrin | 7/10 | 3598 days | 2% |
| Natasha Harbinson | 10/10 | 3599 days | 2% |
| Sebastian | 2/10 | 3600 days | 1% |
| Jaquein Bucholz | 3/10 | 3600 days | 1% |
| Chiara | 7/10 | 3600 days | 2% |
| Cariotta Kemper | 3/10 | 3600 days | 1% |
| Megan Lenox | 7/10 | 3603 days | 2% |
| Max Mustermann | 8/10 | 3605 days | 2% |
| Amy Stafford | 8/10 | 3608 days | 2% |
| Carl | 7/10 | 3608 days | 2% |
| Briony | 7/10 | 3610 days | 2% |
| Melanie Kronbichler | 8/10 | 3611 days | 2% |
| Andreas Schiefer | 7/10 | 3612 days | 2% |
| Veronique Kaplan | 3/10 | 3614 days | 1% |
| Robin Ings | 6/10 | 3615 days | 2% |
| Stula Vladimir | 7/10 | 3616 days | 2% |
| David Soukal | 8/10 | 3616 days | 2% |
| Olivia Aliprandi | 7/10 | 3617 days | 2% |
| Isabelle | 2/10 | 3619 days | 1% |
| Jonathan Gourmel | 8/10 | 3619 days | 2% |
| Mikkel Palleson | 4/10 | 3622 days | 1% |
| Franziska and Sabine | 7/10 | 3623 days | 2% |
| Chloe Guerillot | 7/10 | 3623 days | 2% |
| Faye Oliver | 7/10 | 3625 days | 2% |
| Iris Kerbler | 9/10 | 3625 days | 2% |
| Til Schaebitz | 6/10 | 3626 days | 2% |
| Elisabeth Grabner | 9/10 | 3628 days | 2% |
| Berith | 10/10 | 3628 days | 2% |
| Chris Simpson | 6/10 | 3631 days | 2% |
| Pekka and Jonna | 9/10 | 3631 days | 2% |
| Jonas Hoerning | 8/10 | 3632 days | 2% |
| Nils | 10/10 | 3632 days | 2% |
| Mark Rosema | 8/10 | 3633 days | 2% |
| Lisa Huber | 10/10 | 3633 days | 2% |
| Nicola Wiggan | 9/10 | 3654 days | 2% |
| Linda and Gunther | 4/10 | 3655 days | 1% |
| Julie | 9/10 | 3656 days | 2% |
| Maria Schaer | 7/10 | 3660 days | 2% |
| Mette and Jesper | 5/10 | 3662 days | 1% |
| Pierre and Alexandra | 6/10 | 3668 days | 1% |
| Julia Waenninger | 8/10 | 3680 days | 2% |
| Sarah Boettcher | 9/10 | 3716 days | 2% |
| Suzanne Vermeulen | 6/10 | 3733 days | 1% |
| Blandine Giusti | 7/10 | 3936 days | 1% |
| Bart Hanssen | 6/10 | 4015 days | 1% |
| Astrid Egesten | 7/10 | 4067 days | 1% |
| Jean Curry | 9/10 | 4290 days | 0% |
| Carla Oyarzun | 1/10 | 4294 days | 0% |
| Philippe Chiasson | 9/10 | 4300 days | 0% |
| Helma Druyken | 4/10 | 4310 days | 0% |
| Florian Guttler | 7/10 | 4313 days | 0% |
| Casandra Prunica | 8/10 | 4314 days | 0% |
| Lauren Hedley | 7/10 | 4314 days | 0% |
| Janina Zwerver | 8/10 | 4314 days | 0% |
| Marieke Feyteres | 4/10 | 4318 days | 0% |
| van Linda Werner | 5/10 | 4318 days | 0% |
| Philip Donachie | 7/10 | 4328 days | 0% |
| Luisa Bach | 8/10 | 4328 days | 0% |
| Kristina | 7/10 | 4330 days | 0% |
| Eugen Lehner | 6/10 | 4331 days | 0% |
| Manuel Bach | 7/10 | 4331 days | 0% |
| Matthias Freiling | 2/10 | 4338 days | 0% |
| Debora Grusler | 6/10 | 4341 days | 0% |
| Andreas Brodhaeker | 8/10 | 4354 days | 0% |
| Renee van der Syde | 7/10 | 4355 days | 0% |
| Martha Horst | 8/10 | 4355 days | 0% |
| Roland Beer | 7/10 | 4359 days | 0% |
| Johanna Bak | 4/10 | 4359 days | 0% |
| Lior Bakski | 9/10 | 4369 days | 0% |
| Bet | 9/10 | 4370 days | 0% |
| Memain | 8/10 | 4643 days | 1% |
| Konza | 7/10 | 4644 days | 1% |
| Steen Rausmussen | 8/10 | 4675 days | 1% |
| David Restell | 10/10 | 4705 days | 1% |
| Christina Rodewald | 9/10 | 4710 days | 1% |
| Hanneke P | 7/10 | 4736 days | 1% |
| Kohler | 9/10 | 4756 days | 1% |
| Alexandra van den Brack | 6/10 | 4764 days | 1% |
| Paul Lawrence | 9/10 | 4765 days | 1% |
| Abby Rushmer | 7/10 | 4766 days | 1% |
| Stephan Olivier | 7/10 | 4771 days | 1% |
| Stephan Olivier | 7/10 | 4771 days | 1% |
| Faassen | 8/10 | 4775 days | 1% |
| Julie Lamart | 8/10 | 4776 days | 1% |
| Adrian Weidell | 5/10 | 4972 days | 1% |
| Jonathan Tuthill | 9/10 | 5027 days | 1% |
| A Ormsby | 10/10 | 5039 days | 1% |
| Gillian Rowe | 10/10 | 5052 days | 1% |
| Ryan Pynappels | 8/10 | 5053 days | 1% |
| Peter Dellen | 8/10 | 5054 days | 1% |
| Jorg Steffens | 8/10 | 5054 days | 1% |
| Danielle & Jobbe | 9/10 | 5056 days | 1% |
| Christina | 6/10 | 5057 days | 1% |
| Jop Veldhuis | 7/10 | 5057 days | 1% |
| Paul Weidenfeld | 8/10 | 5058 days | 1% |
| Sophie Dorrepaal | 7/10 | 5058 days | 1% |
| Fannette Peyreplane | 5/10 | 5059 days | 1% |
| Norm Cooper | 7/10 | 5063 days | 1% |
| Gloria, Rose & An | 8/10 | 5063 days | 1% |
| A Sorg | 10/10 | 5063 days | 1% |
| Samplonius | 5/10 | 5066 days | 1% |
| Petra | 10/10 | 5066 days | 1% |
| Bethany Hamilton | 8/10 | 5070 days | 1% |
| suffolkhouse69 | 9/10 | 5071 days | 1% |
| a a | 8/10 | 5102 days | 1% |
| Julia Balionis | 7/10 | 5116 days | 1% |
| Julia Hartman | 3/10 | 5117 days | 1% |
| Fabienne Indergand | 7/10 | 5137 days | 1% |
| Waldemar Schuler | 9/10 | 5149 days | 1% |
| pepette31 | 7/10 | 5224 days | 1% |
| Craig Hathaway | 9/10 | 5376 days | 1% |
| Stephane Lebel | 9/10 | 5381 days | 1% |
| Rens Hemselmans | 7/10 | 5394 days | 1% |
| Isabell | 10/10 | 5396 days | 1% |
| Holly Cave | 5/10 | 5396 days | 1% |
| J Palmer | 6/10 | 5400 days | 1% |
| Liz & Jim | 10/10 | 5402 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5404 days | 1% |
| Simon Vickers | 2/10 | 5407 days | 1% |
| Leslie | 8/10 | 5420 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5421 days | 1% |
| Selina Mueller | 7/10 | 5422 days | 1% |
| Tamlin Barton | 3/10 | 5423 days | 1% |
| Cara Dungay | 8/10 | 5424 days | 1% |
| Bottcher | 10/10 | 5424 days | 1% |
| Alexandra | 10/10 | 5425 days | 1% |
| Philipp Rau | 7/10 | 5427 days | 1% |
| Dan Aldridge | 9/10 | 5429 days | 1% |
| John Allen | 8/10 | 5431 days | 1% |
| Curtis Penner | 8/10 | 5431 days | 1% |
| Brandt | 8/10 | 5433 days | 1% |
| Nadia Husain | 5/10 | 5436 days | 1% |
| T J Andrews | 6/10 | 5452 days | 1% |
| Charli Skinner | 7/10 | 5703 days | 1% |
| Carl_Larsen | 10/10 | 5712 days | 1% |
| Susan & Richard | 10/10 | 5773 days | 1% |
| Rik | 9/10 | 5774 days | 1% |
| Jonathan Martin | 7/10 | 5776 days | 1% |
| Gunda G | 9/10 | 5781 days | 1% |
| Aaron | 8/10 | 5783 days | 1% |
| Will Jemma | 6/10 | 5786 days | 1% |
| Christen Hans | 10/10 | 5787 days | 1% |
| Monica and Danie. | 7/10 | 5795 days | 1% |
| Stephen | 5/10 | 5797 days | 1% |
| Susan | 10/10 | 5797 days | 1% |
| snodge | 8/10 | 5801 days | 1% |
| Bo Moenstead | 9/10 | 5810 days | 1% |
| Alain Deslandres | 8/10 | 5814 days | 1% |
| Jakob Jurgen | 10/10 | 5815 days | 1% |
| EA Anders | 8/10 | 5818 days | 1% |
| Helen and Hans Walser | 1/10 | 5821 days | 0% |
| kevinp | 8/10 | 5844 days | 1% |
| warrenp | 9/10 | 5848 days | 1% |
| braunweiler | 9/10 | 5852 days | 1% |
| pimn | 9/10 | 5857 days | 1% |
| asiacritics | 7/10 | 5863 days | 1% |
| Chris Mackamul | 8/10 | 5870 days | 1% |
| Debbie Rathbone | 10/10 | 5870 days | 1% |
| Lisette X | 9/10 | 5871 days | 1% |
| Martin | 10/10 | 5873 days | 1% |
| Thomas Willi | 10/10 | 5873 days | 1% |
| Elodie | 7/10 | 5874 days | 1% |
| richardh | 7/10 | 5988 days | 1% |
| trvlbug | 8/10 | 6016 days | 1% |
| glennandjen | 10/10 | 6077 days | 1% |
| BryonyS | 9/10 | 6095 days | 1% |
| Marion | 9/10 | 6111 days | 1% |
| Mikey | 7/10 | 6112 days | 1% |
| Richard Komzik | 6/10 | 6113 days | 1% |
| Michael Walsall | 10/10 | 6117 days | 1% |
| Anna | 8/10 | 6131 days | 1% |
| Abigail | 7/10 | 6131 days | 1% |
| lannie | 7/10 | 6141 days | 1% |
| SimonR | 8/10 | 6141 days | 1% |
| SonjaG | 7/10 | 6141 days | 1% |
| Chris | 8/10 | 6147 days | 1% |
| AurelieD | 8/10 | 6154 days | 1% |
| Yunker | 10/10 | 6155 days | 1% |
| Andrew | 8/10 | 6158 days | 1% |
| Erin | 9/10 | 6158 days | 1% |
| Christopher Gallaga | 8/10 | 6163 days | 1% |
| Amy | 10/10 | 6169 days | 1% |
| Shona | 8/10 | 6169 days | 1% |
| plumbaum | 9/10 | 6171 days | 1% |
| Sandra | 10/10 | 6179 days | 1% |
| Evangelista | 8/10 | 6179 days | 1% |
| Oliver | 5/10 | 6181 days | 1% |
| Kat | 9/10 | 6211 days | 1% |
| Lisa | 8/10 | 6238 days | 1% |
| siobhan | 8/10 | 6240 days | 1% |
| Alice | 8/10 | 6240 days | 1% |
| NORTZ | 7/10 | 6269 days | 1% |
| Stefan | 8/10 | 6271 days | 1% |
| Hugh Trenchard | 9/10 | 6287 days | 1% |
| Niamh | 4/10 | 6294 days | 1% |
| Jenny | 9/10 | 6318 days | 1% |
| Louise | 8/10 | 6326 days | 1% |
| Peddy | 10/10 | 6336 days | 1% |
| Katie Wise | 8/10 | 6339 days | 1% |
| Thomas Bachmann | 8/10 | 6355 days | 1% |
| Daniala | 8/10 | 6374 days | 1% |
| Tom Ben | 9/10 | 6478 days | 1% |
| Sarah Maudsley | 8/10 | 6493 days | 1% |
| Alan Bellerby | 8/10 | 6493 days | 1% |
| Tina Daly | 5/10 | 6499 days | 1% |
| John Woodrow | 8/10 | 6508 days | 1% |
| Ernst Seter | 9/10 | 6508 days | 1% |
| Jim Curley | 7/10 | 6519 days | 1% |
| Daniel | 7/10 | 6520 days | 1% |
| Marc Hertogs | 7/10 | 6523 days | 1% |
| Laura Sutton | 5/10 | 6547 days | 1% |
| Jeroen | 5/10 | 6549 days | 1% |
| Mum! | 6/10 | 6549 days | 1% |
| Gail | 9/10 | 6553 days | 1% |
| Heike Julia | 6/10 | 6554 days | 1% |
| Lanni | 8/10 | 6554 days | 1% |
| Amanda Finger | 7/10 | 6555 days | 1% |
| Desiree Muri | 7/10 | 6555 days | 1% |
| Jan Grzejik | 8/10 | 6582 days | 1% |
| Wouter Ewalts | 8/10 | 6589 days | 1% |
| Matilde | 6/10 | 6597 days | 1% |
| Kim | 6/10 | 6794 days | 1% |
| Gillian | 8/10 | 6836 days | 1% |
| Denise Nick | 6/10 | 6846 days | 1% |
| ranker_110 | 8/10 | 6865 days | 1% |
| Jasper | 7/10 | 6872 days | 1% |
| Mary | 8/10 | 6872 days | 1% |
| Lucy | 6/10 | 6872 days | 1% |
| Lukas | 8/10 | 6883 days | 1% |
| Hanna | 7/10 | 6885 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.04% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.98% |
| 198 | -4.00% |
| 199 | -4.02% |
| 200 | -4.04% |
| 201 | -4.06% |
| 202 | -4.08% |
| 203 | -4.10% |
| … | … |
Balancing Adjustment
6.04% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.